[SM] Addresses/Pointers, and the Gravity Hex Tweak

[dewhi100]

I'm trying to find where/how the value for gravity (listed in the Hex Tweaks) is used. It's at 81EA2 in the ROM, meaning that it should be at 10:9EA2 in the memory map (I think).

But I just can't seem to find that address used anywhere, at least not in a way that looks like it makes sense. I've tried searching for "A29E", and the most reasonable thing I could find was "79 A2 9E" (ADC addr,Y)... which still doesn't sound right.

Now I'm full of doubts. Maybe I should be looking for "9EA2"; Does the address read this way when pointing to a 24-bit address? Even if it is, I don't think that the address is pointed to that way. Wouldn't there be a "10" before or after the "9EA2/A29E"? I've tried looking up how 24-bit addresses work, but haven't had much luck. Or is this just not working because of the nature of a hex tweak? Could the actual constant for gravity be somewhere else, with this byte just happening to modify it?

I just want to understand gravity!

[P.JBoy]

Look for $9EA1, you'll find references in $90:9C5B and $91:E00D which are both pretty deep in the physics engine

[dewhi100]

Thanks P.J. The fact that the hex tweak is for the second byte in the constant never occurred to me. It's turning up now.